Traxxas Revo Nitro to Electric Conversion Motor Mount

This is a brushless motor mount that I designed for my Traxxas Revo 2.5R electric conversion. It bolts directly in place of the nitro engine when the engine and original mounts have been removed (as in photos), and uses the original screws. I'm running a 2300kv motor with a 120A ESC using a 16 tooth pinion on the motor and the original 38 tooth spur gear. This is giving a bit too much torque and it wheelies everywhere, on practically any surface. I'm about to test out a 36 tooth spur in hope